This “Expert Gardener” “Light Duty” garden hose was tested new on the shelf in Walmart in 2017. Only the plastic part of the hose was tested and it was positive for lead (Pb) at 52 parts per million.
52 ppm lead is a relatively low level of lead, but I would still have concerns for water sitting in this hose in the hot sun over time. Unfortunately I did not have the opportunity to test the hardware (the yellow brass) on this particular hose. Most yellow brass (especially on garden hoses that are not clearly marked as being lead-free) is likely high lead content brass, in the 30,000 to 40,000 ppm range.
In general I think a hose (and anything used for gardening or food use or use for play by children) should be lead-free.
As always, please let me know if you have any questions!